The space station has a full body shower unit. When astronauts want to take a shower, they step into a cylindrical shower stall and close the door. They then get themselves wet and wash up just like you would on Earth. However, due to weightlessness, the water droplets and soap don't flow downwards into a drain, they float about. Astronauts use a suction device to get rid of the waste water. visited the international space station museum. you can see a shower unit.
Hi susannah and welcome to the forums - I think we may have done something about space stations and showers at some point, and of course it's too late for M series now, but O series contributions are always welcome :-)